The Free Lunch Is Over: A Fundamental Turn Toward Concurrency in Software

[Timothy Luoma]

I stumbled across this somehow today (don't remember where from 
unfortunately... I opened it in the background while reading another 
page and by the time I saw it, I forgot where it came from).

http://www.gotw.ca/publications/concurrency-ddj.htm

He does a good job (I think) of explaining the problems of why 
hyperthreading, et al don't help as much as you might think they should 
(or as much as I think they should).

FWIW

TjL